diff options
author | Ariel Levkovich <lariel@mellanox.com> | 2019-05-05 17:07:13 +0300 |
---|---|---|
committer | Jason Gunthorpe <jgg@mellanox.com> | 2019-05-06 12:51:51 -0300 |
commit | 25c13324d03d004f9e8071bf5bf5d5c6fdace71e (patch) | |
tree | 394ccf193adba31c1ac13912aa91567012df602e /drivers/infiniband/hw/mlx5/main.c | |
parent | 4056b12efd43248d8331b6ed93df5ea5250106a9 (diff) | |
download | linux-25c13324d03d004f9e8071bf5bf5d5c6fdace71e.tar.bz2 |
IB/mlx5: Add steering SW ICM device memory type
This patch adds support for allocating, deallocating and registering a new
device memory type, STEERING_SW_ICM. This memory can be allocated and
used by a privileged user for direct rule insertion and management of the
device's steering tables.
The type is provided by the user via the dedicated attribute in the
alloc_dm ioctl command.
Signed-off-by: Ariel Levkovich <lariel@mellanox.com>
Reviewed-by: Eli Cohen <eli@mellanox.com>
Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'drivers/infiniband/hw/mlx5/main.c')
-rw-r--r-- | drivers/infiniband/hw/mlx5/main.c | 142 |
1 files changed, 135 insertions, 7 deletions
diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c index 803aea335953..f9def2dfdba3 100644 --- a/drivers/infiniband/hw/mlx5/main.c +++ b/drivers/infiniband/hw/mlx5/main.c @@ -2264,6 +2264,28 @@ static int mlx5_ib_mmap(struct ib_ucontext *ibcontext, struct vm_area_struct *vm return 0; } +static inline int check_dm_type_support(struct mlx5_ib_dev *dev, + u32 type) +{ + switch (type) { + case MLX5_IB_UAPI_DM_TYPE_MEMIC: + if (!MLX5_CAP_DEV_MEM(dev->mdev, memic)) + return -EOPNOTSUPP; + break; + case MLX5_IB_UAPI_DM_TYPE_STEERING_SW_ICM: + if (!capable(CAP_SYS_RAWIO) || + !capable(CAP_NET_RAW)) + return -EPERM; + + if (!(MLX5_CAP_FLOWTABLE_NIC_RX(dev->mdev, sw_owner) || + MLX5_CAP_FLOWTABLE_NIC_TX(dev->mdev, sw_owner))) + return -EOPNOTSUPP; + break; + } + + return 0; +} + static int handle_alloc_dm_memic(struct ib_ucontext *ctx, struct mlx5_ib_dm *dm, struct ib_dm_alloc_attr *attr, @@ -2309,6 +2331,40 @@ err_dealloc: return err; } +static int handle_alloc_dm_sw_icm(struct ib_ucontext *ctx, + struct mlx5_ib_dm *dm, + struct ib_dm_alloc_attr *attr, + struct uverbs_attr_bundle *attrs, + int type) +{ + struct mlx5_dm *dm_db = &to_mdev(ctx->device)->dm; + u64 act_size; + int err; + + /* Allocation size must a multiple of the basic block size + * and a power of 2. + */ + act_size = roundup(attr->length, MLX5_SW_ICM_BLOCK_SIZE(dm_db->dev)); + act_size = roundup_pow_of_two(act_size); + + dm->size = act_size; + err = mlx5_cmd_alloc_sw_icm(dm_db, type, act_size, + to_mucontext(ctx)->devx_uid, &dm->dev_addr, + &dm->icm_dm.obj_id); + if (err) + return err; + + err = uverbs_copy_to(attrs, + MLX5_IB_ATTR_ALLOC_DM_RESP_START_OFFSET, + &dm->dev_addr, sizeof(dm->dev_addr)); + if (err) + mlx5_cmd_dealloc_sw_icm(dm_db, type, dm->size, + to_mucontext(ctx)->devx_uid, + dm->dev_addr, dm->icm_dm.obj_id); + + return err; +} + struct ib_dm *mlx5_ib_alloc_dm(struct ib_device *ibdev, struct ib_ucontext *context, struct ib_dm_alloc_attr *attr, @@ -2327,6 +2383,10 @@ struct ib_dm *mlx5_ib_alloc_dm(struct ib_device *ibdev, mlx5_ib_dbg(to_mdev(ibdev), "alloc_dm req: dm_type=%d user_length=0x%llx log_alignment=%d\n", type, attr->length, attr->alignment); + err = check_dm_type_support(to_mdev(ibdev), type); + if (err) + return ERR_PTR(err); + dm = kzalloc(sizeof(*dm), GFP_KERNEL); if (!dm) return ERR_PTR(-ENOMEM); @@ -2339,6 +2399,10 @@ struct ib_dm *mlx5_ib_alloc_dm(struct ib_device *ibdev, attr, attrs); break; + case MLX5_IB_UAPI_DM_TYPE_STEERING_SW_ICM: + case MLX5_IB_UAPI_DM_TYPE_HEADER_MODIFY_SW_ICM: + err = handle_alloc_dm_sw_icm(context, dm, attr, attrs, type); + break; default: err = -EOPNOTSUPP; } @@ -2355,6 +2419,8 @@ err_free: int mlx5_ib_dealloc_dm(struct ib_dm *ibdm, struct uverbs_attr_bundle *attrs) { + struct mlx5_ib_ucontext *ctx = rdma_udata_to_drv_context( + &attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext); struct mlx5_dm *dm_db = &to_mdev(ibdm->device)->dm; struct mlx5_ib_dm *dm = to_mdm(ibdm); u32 page_idx; @@ -2371,11 +2437,16 @@ int mlx5_ib_dealloc_dm(struct ib_dm *ibdm, struct uverbs_attr_bundle *attrs) MLX5_CAP64_DEV_MEM(dm_db->dev, memic_bar_start_addr)) >> PAGE_SHIFT; - bitmap_clear(rdma_udata_to_drv_context(&attrs->driver_udata, - struct mlx5_ib_ucontext, - ibucontext) - ->dm_pages, - page_idx, DIV_ROUND_UP(dm->size, PAGE_SIZE)); + bitmap_clear(ctx->dm_pages, page_idx, + DIV_ROUND_UP(dm->size, PAGE_SIZE)); + break; + case MLX5_IB_UAPI_DM_TYPE_STEERING_SW_ICM: + case MLX5_IB_UAPI_DM_TYPE_HEADER_MODIFY_SW_ICM: + ret = mlx5_cmd_dealloc_sw_icm(dm_db, dm->type, dm->size, + ctx->devx_uid, dm->dev_addr, + dm->icm_dm.obj_id); + if (ret) + return ret; break; default: return -EOPNOTSUPP; @@ -5902,6 +5973,8 @@ static struct ib_counters *mlx5_ib_create_counters(struct ib_device *device, static void mlx5_ib_stage_init_cleanup(struct mlx5_ib_dev *dev) { + struct mlx5_core_dev *mdev = dev->mdev; + mlx5_ib_cleanup_multiport_master(dev); if (IS_ENABLED(CONFIG_INFINIBAND_ON_DEMAND_PAGING)) { srcu_barrier(&dev->mr_srcu); @@ -5909,11 +5982,29 @@ static void mlx5_ib_stage_init_cleanup(struct mlx5_ib_dev *dev) } WARN_ON(!bitmap_empty(dev->dm.memic_alloc_pages, MLX5_MAX_MEMIC_PAGES)); + + WARN_ON(dev->dm.steering_sw_icm_alloc_blocks && + !bitmap_empty( + dev->dm.steering_sw_icm_alloc_blocks, + BIT(MLX5_CAP_DEV_MEM(mdev, log_steering_sw_icm_size) - + MLX5_LOG_SW_ICM_BLOCK_SIZE(mdev)))); + + kfree(dev->dm.steering_sw_icm_alloc_blocks); + + WARN_ON(dev->dm.header_modify_sw_icm_alloc_blocks && + !bitmap_empty(dev->dm.header_modify_sw_icm_alloc_blocks, + BIT(MLX5_CAP_DEV_MEM( + mdev, log_header_modify_sw_icm_size) - + MLX5_LOG_SW_ICM_BLOCK_SIZE(mdev)))); + + kfree(dev->dm.header_modify_sw_icm_alloc_blocks); } static int mlx5_ib_stage_init_init(struct mlx5_ib_dev *dev) { struct mlx5_core_dev *mdev = dev->mdev; + u64 header_modify_icm_blocks = 0; + u64 steering_icm_blocks = 0; int err; int i; @@ -5959,16 +6050,51 @@ static int mlx5_ib_stage_init_init(struct mlx5_ib_dev *dev) INIT_LIST_HEAD(&dev->qp_list); spin_lock_init(&dev->reset_flow_resource_lock); + if (MLX5_CAP_GEN_64(mdev, general_obj_types) & + MLX5_GENERAL_OBJ_TYPES_CAP_SW_ICM) { + if (MLX5_CAP64_DEV_MEM(mdev, steering_sw_icm_start_address)) { + steering_icm_blocks = + BIT(MLX5_CAP_DEV_MEM(mdev, + log_steering_sw_icm_size) - + MLX5_LOG_SW_ICM_BLOCK_SIZE(mdev)); + + dev->dm.steering_sw_icm_alloc_blocks = + kcalloc(BITS_TO_LONGS(steering_icm_blocks), + sizeof(unsigned long), GFP_KERNEL); + if (!dev->dm.steering_sw_icm_alloc_blocks) + goto err_mp; + } + + if (MLX5_CAP64_DEV_MEM(mdev, + header_modify_sw_icm_start_address)) { + header_modify_icm_blocks = BIT( + MLX5_CAP_DEV_MEM( + mdev, log_header_modify_sw_icm_size) - + MLX5_LOG_SW_ICM_BLOCK_SIZE(mdev)); + + dev->dm.header_modify_sw_icm_alloc_blocks = + kcalloc(BITS_TO_LONGS(header_modify_icm_blocks), + sizeof(unsigned long), GFP_KERNEL); + if (!dev->dm.header_modify_sw_icm_alloc_blocks) + goto err_dm; + } + } + spin_lock_init(&dev->dm.lock); dev->dm.dev = mdev; if (IS_ENABLED(CONFIG_INFINIBAND_ON_DEMAND_PAGING)) { err = init_srcu_struct(&dev->mr_srcu); if (err) - goto err_mp; + goto err_dm; } return 0; + +err_dm: + kfree(dev->dm.steering_sw_icm_alloc_blocks); + kfree(dev->dm.header_modify_sw_icm_alloc_blocks); + err_mp: mlx5_ib_cleanup_multiport_master(dev); @@ -6151,7 +6277,9 @@ static int mlx5_ib_stage_caps_init(struct mlx5_ib_dev *dev) ib_set_device_ops(&dev->ib_dev, &mlx5_ib_dev_xrc_ops); } - if (MLX5_CAP_DEV_MEM(mdev, memic)) + if (MLX5_CAP_DEV_MEM(mdev, memic) || + MLX5_CAP_GEN_64(dev->mdev, general_obj_types) & + MLX5_GENERAL_OBJ_TYPES_CAP_SW_ICM) ib_set_device_ops(&dev->ib_dev, &mlx5_ib_dev_dm_ops); if (mlx5_accel_ipsec_device_caps(dev->mdev) & |